waybar: fix compatibility with kernels >=5.11

[lovesegfault]

Motivation for this change

Fixes #114870

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[r-rmcgibbo]

Result of nixpkgs-review pr 114933 at fcb969e run on aarch64-linux 1

1 package built:

• waybar

1 suggestion:

• warning: meson-cmake

  Meson uses CMake as a fallback dependency resolution method and it likely is not necessary here. The message about cmake not being found is purely informational.

  Near pkgs/applications/misc/waybar/default.nix:51:3:

     |
  51 |   nativeBuildInputs = [
     |   ^
  

---

Result of nixpkgs-review pr 114933 at fcb969e run on x86_64-linux 1

1 package built:

• waybar

1 suggestion:

• warning: meson-cmake

  Meson uses CMake as a fallback dependency resolution method and it likely is not necessary here. The message about cmake not being found is purely informational.

  Near pkgs/applications/misc/waybar/default.nix:51:3:

     |
  51 |   nativeBuildInputs = [
     |   ^